Link-Seal® Modular Seals, Model "C" (EPDM) or
Model "S-316" installed in a cored hole.

EPDM rubber is resistant to most inorganic acids and alkalis, and some organic chemicals (acetone, alcohol, ketones). Suitable for use in water, direct ground burial and atomspheric conditions.
Model "C" includes standard bolts and nuts* while Model "S-316" includes 316 Stainless Steel Bolts and Nuts
Link-Seal® Model "C"

Link-Seal® Modular Seals, Model "O" (Nitrile) or
Model "OS-316" installed with a Century-Line® Sleeve

Nitrile rubber is resistant to oils, fuel and many solvents (gasoline, motor oil, kerosene, methane, jet fuel, hydraulic fluid, water, etc.). While resistant to normal atmospheric conditions, Nitirle is not U.V. resistant.
Model "O" includes standard bolts and nuts* while Model "OS-316" includes 316 Stainless Steel Bolts and Nuts
Link-Seal® Model "O" Modular Seals

Link-Seal® Modular Seals, Model "T" (Silicone) installed with a Model WS Steel Sleeve
Silicone rubber is ideal for temperature extremes. In addition, the Model "T" is one-hour FM (Factory Mutual) approved.
Link-Seal® Model "T" Modular Seals   |   WS Wall Sleeves

Link-Seal® Modular Seals, Model "L" or "LS-316" (Low Durometer EPDM) installed with a Century-Line® Sleeve
The Low Durometer Model "L" is excellent for use with thin wall metal pipe, applications using plastic, ceramic or glass pipe - or applications where the cylindrical object is fragile and may not withstand the compressing forces generated by a standard Link-Seal® Modular Seal.
Link-Seal® Model "L" Modular Seals
Century-Line® Sleeves

* = Standard Bolts and Nuts are steel with 2-part Zinc Dichromate and proprietary corrosion inhibiting coating.

Distributor Locator

Find your nearest Link-Seal® Modular Seal distributor. Simply click below and you will be directed to a page where you can input your zip code and quickly receive a response with the location of your nearest professional distributor that will provide you with pricing and delivery information.
Link-Seal® Modular Seal Distributor Locator

Buy America Stimulus Provision
ARRA - American Recovery Reinvestment Act

PSI - Pipeline Seal and Insulator, Inc. is providing this letter to certify that all the products listed here are manufactured and assembled in the U.S.A.
The raw materials for these products are also obtained in the U.S.A.

ARRA Document in PDF Format

Enpro Industries announces acquisition of PSI

New Universal Pressure Plate Design
Link-Seal® Modular Seals are now available with new "force dispersion" pressure plates that are desigend to more evenly spread the tensional forces created when torquing the central bolt against both pressure plate and rubber seal. In addition, the new design has an average of 15% more strength than previous Link-Seal® Modular Seal versions.
The Universal Pressure Plate design spans the entire line of Link-Seal® Modular Seals.

Link-Seal® Modular Seals are now standardized with metric hardware.
To provide consistency and worldwide compatibility, PSI now offers all Link-Seal® Modular Seal sizes with metric bolts. The new bolts adhere to metric specifications as used by most all countries outside the U.S.A. Smaller Link-Seal® Modular Seals (sizes LS-200, LS-275, LS-300, and LS-315) will consist of metric Allen head or socket cap bolt heads while the balance of the line will use standard hex head metric bolts. Please refer to new Link-Seal® Modular Seal literature for specifics on bolt sizes and configurations.

New Generation LS-315 with Force Dispersion Pressure Plates and Metric Allen Head Bolts